﻿/* dk2Repository - Copyright (C) 2011 Daniel Kuczewski http://www.dk2.de/

 * This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA */

using System;
using System.Data;
using System.Data.Common;

namespace dk2Database.Commands
{
    /// <summary>
    /// Query Command with generic return type 
    /// For internal use with expression lambda methods
    /// </summary>
    internal class LambdaQueryEntityCommand<T> :  QueryEntityCommandBase<T>
    {
        private readonly Func<IDataReader, T> _convertReaderMethod;

        public LambdaQueryEntityCommand(Func<IDataReader, T> convertReaderMethod, string sql)
            : base(sql)
        {
            _convertReaderMethod = convertReaderMethod;
        }

        public LambdaQueryEntityCommand(Func<IDataReader, T> convertReaderMethod, string sql, CommandParameters parameters)
            : base(sql, parameters)
        {
            _convertReaderMethod = convertReaderMethod;
        }

        public LambdaQueryEntityCommand(Func<IDataReader, T> convertReaderMethod, string sql, params object[] parameters)
            : base(sql, parameters)
        {
            _convertReaderMethod = convertReaderMethod;
        }

        public override T ProcessDataReader(IDataReader reader)
        {
            return _convertReaderMethod(reader);
        }

    }



    

}